15321143140 has 12 divisors (see below), whose sum is σ = 32174400636. Its totient is φ = 6128457248.

The previous prime is 15321143137. The next prime is 15321143153. The reversal of 15321143140 is 4134112351.

It can be written as a sum of positive squares in 2 ways, for example, as 8601078564 + 6720064576 = 92742^2 + 81976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383028559 + ... + 383028598.

It is an arithmetic number, because the mean of its divisors is an integer number (2681200053).

Almost surely, 2^15321143140 is an apocalyptic number.

15321143140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15321143140 is an abundant number, since it is smaller than the sum of its proper divisors (16853257496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15321143140 is a wasteful number, since it uses less digits than its factorization.

15321143140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766057166 (or 766057164 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 15321143140 its reverse (4134112351), we get a palindrome (19455255491).

The spelling of 15321143140 in words is "fifteen billion, three hundred twenty-one million, one hundred forty-three thousand, one hundred forty".